lovely to hear from you - i think of you often!
Have looked at your lovely wallpaper and sundry of my resources here, but no definitive answers popping up. My thinking is that it is early twentieth century rather than later - because I think it would be more stylized if it was later than 1920s. Crysanthemums and daisy like flowers were quite popular on 1920s dress fabrics, then again in the 1940s. Not necessarily very helpful.....
lots of love to you and yours